import React, { Component } from "react";
// 引入action
import {
  createIncrementAction,
  createDecrementAction,
  createIncrementAsyncAction,
} from "../../redux/actions/count";
// 引入connect同于连接UI组件与redux
import { connect } from "react-redux";

class Count extends Component {
  state = { carName: "奔驰c63" };

  // 加法
  increment = () => {
    const { value } = this.selectNumber;
    this.props.increment(value * 1);
  };
  //减法
  decrement = () => {
    const { value } = this.selectNumber;
    this.props.decrement(value * 1);
  };
  //奇数再加
  incrementIfOdd = () => {
    const { value } = this.selectNumber;
    if (this.props.count % 2 !== 0) {
      this.props.increment(value * 1);
    }
  };
  //异步加
  incrementAsync = () => {
    const { value } = this.selectNumber;
    this.props.incrementAsync(value * 1, 500);
  };

  render() {
    return (
      <div>
        <h2>Count组件, 下方组件总人数为: {this.props.total}</h2>
        <h4>
          当前求和为：{this.props.count}
        </h4>
        <select ref={(c) => (this.selectNumber = c)}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>
        &nbsp;
        <button onClick={this.increment}>+</button>&nbsp;
        <button onClick={this.decrement}>-</button>&nbsp;
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
        <button onClick={this.incrementAsync}>异步加</button>&nbsp;
      </div>
    );
  }
}

// 创建并暴露一个Count的容器组件
export default connect(
  (state) => ({ count: state.count, total: state.persons.length }),
  {
    increment: createIncrementAction,
    decrement: createDecrementAction,
    incrementAsync: createIncrementAsyncAction,
  }
)(Count);
